Iterating through all functions in a ModuleScript

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#1

Heyo!

Pretty much I have a bunch of functions in a ModuleScript to function as a pseudo database, and I want to be able to reference the same-named variables in each differently-named function.

Is this possible? If so, how would I use some form of iteration to print the variable from each function? I’ve tried looking around but I couldn’t find anything. D:

This was the closest thing I found, though I’m not sure if it’s what I’m looking for.

2 Likes
#2

It’s actually really simple.

Module scripts are formatted like tables in a script, but people use them so their scripts don’t get super long, or copy and paste.

Here’s an example:
This is one script

Script 
local module = {}

function module.A()
	print("A")
end

function module.B()
	print("B")
end

function module.C()
	print("C")
end

for i,v in pairs(module) do
	print(i,v) -- i is the name of the function, v will call the function
	v()
end

Now for an example in a module script!

Module 
local module = {}

function module.A()
	print("A")
end

function module.B()
	print("B")
end

function module.C()
	print("C")
end

return module
Script 
local module = require(game.ServerScriptService.ModuleScript)

for i,v in pairs(module) do
	print(i,v) -- i is the name of the function, v will call the function
	v()
end

I hope this helped you understand :slight_smile:

11 Likes
#3

Building off of @xuefei123’s post, you can also check the ‘type’ to ensure it’s actually a function. This is useful if your module is storing other fields too:

for k,v in pairs(module) do
   if (type(v) == "function") then
      -- 'v' is the function and 'k' is the name
   end
end
8 Likes
#4

Adding to the above, it’s worth noting that ModuleScripts are just SourceContainers, like Scripts, LocalScripts, and CoreScripts. This means that they don’t have functions ‘in’ them.

You might choose to return a table in the code you write in a ModuleScript. There may be functions in that table. If so, follow the advice above.

In any given ModuleScript, however, you might have written code to return a function, or a string, or a Part, etc.

3 Likes
#5

Very clear-cut and helpful, thanks!

Also thanks for all the other clarifications @Crazyman32 + @sircfenner!

1 Like